Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d0ee53907739ba…

MALICIOUS

PDF

69.0 KB Created: 2020-12-20 00:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e11f32ee5060adc52a01f1b1fe09d1e7 SHA-1: 144fcdeb19fe9f9148cb7c91d1d8462e183ba286 SHA-256: 68d0ee53907739ba509c59bd94c6ad81356271d0bc66fb76b17960d8755f52f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. The primary URL, trafftec.ru, is likely used to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/strik?utm_term=corrupt+bargain+apush+significance
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5f939610569c7.pdf
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/bf57a09f79.pdf
    • https://xigunokitipir.weebly.com/uploads/1/3/4/6/134615451/maratomupokujufateda.pdf
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/dugexedujuda-simuzij-kujam-xizifogo.pdf
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/9282869.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/24e2fdfa-f01c-4ee1-83c8-958b76a84932/durosifoguxasebapelef.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/charles_web_debugging_proxy_crack_free.pdf
    • https://uploads.strikinglycdn.com/files/e43c8f77-4379-46fe-9f63-6e38324f80f1/18462115561.pdf
    • https://uploads.strikinglycdn.com/files/f5462e75-5c7f-442e-9771-24bbcdf99bfe/sapomikugirijudug.pdf
    • https://uploads.strikinglycdn.com/files/10c2d86e-5f9f-4984-87ed-e4e677d9eac4/16621223214.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d173.bin
c35eda2282676ed3a1b93dd79c1dea0cca422cf68457c3965226fedf834d6f32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 5292 bytes
font_01_sfnt_off0000e36b.bin
c862d0bba05033549763dba8aba7db6a69f699626a4f097d5d0fab6cebf59477		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE36B 10592 bytes

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